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Innovative ladder-shaped fin design on a latent heat storage device for waste heat recovery
Qingdao University of Science and Technology, Qingdao, 266061, China.
School of Human Settlements and Civil Engineering, Xi'an Jiaotong University, Xi'an, 710049, China.
China Northwest Architecture Design and Research Institute, CO. Ltd, Shaanxi Province, Xi'an 710077, China.
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2022 (English)In: Applied Energy, ISSN 0306-2619, E-ISSN 1872-9118, Vol. 321, article id 119300Article in journal (Refereed) Published
Abstract [en]

Latent heat energy storage system provides an alternative solution to solving the imbalance problem of energy supply and demand. To improve the phase change efficiency, a novel ladder-shaped fin is proposed to accelerate melting process. Under the same mass of fin materials, two groups of fin shapes (totally eight cases) are innovatively designed. Upon being verified by experiments in literature, numerical models account for comprehensive descriptions on melting front propagation with emphasizing temperature development and free convection in the liquid phase. Results demonstrate that the ladder-shaped fins can better optimize the melting channel of phase change material than the straight fin. Compared to the original straight fin case, a maximal 52.2% of the total melting time can be saved. The angle change of fins has a significant effect on reducing the melting time of the whole PCM. In Group I where fins are arranged vertically and horizontally, the total melting time is much shorter than that of each corresponding case in Group II (45° from the vertical axis). For the original straight fin in Group II, a 36.8% reduction in total melting time is obtained if turning fins by 45°clockwise. To be conclusive, it is more beneficial to add fins to mobile heat accumulators than to have no fins, saving more energy charging time. 

Place, publisher, year, edition, pages
Elsevier Ltd , 2022. Vol. 321, article id 119300
Keywords [en]
Ladder-shaped fin, Latent heat thermal storage, Mobilized thermal storage, Phase change material, Waste heat recovery, Economics, Ladders, Latent heat, Melting, Phase change materials, Storage (materials), Virtual storage, Waste heat, Waste heat utilization, Heat storage devices, Latent heat energy storage, Latent heat storage, Melting time, Straight fins, Thermal storage, Waste-heat recovery, Heat storage
National Category
Energy Systems
Identifiers
URN: urn:nbn:se:mdh:diva-59055DOI: 10.1016/j.apenergy.2022.119300ISI: 000810718300002Scopus ID: 2-s2.0-85131386479OAI: oai:DiVA.org:mdh-59055DiVA, id: diva2:1669843
Available from: 2022-06-15 Created: 2022-06-15 Last updated: 2022-06-29Bibliographically approved

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Yan, Jinyue

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